KR102577637B1 - water foamable insecticidal composition - Google Patents

Abstract

The present invention relates to an underwater foamable dispersible insecticidal composition.
In order to solve the above-described problems, the water-foaming dispersible insecticidal composition of the present invention contains 1 to 5% by weight of insecticidal ingredient, 3 to 10% by weight of dispersant of the entire insecticidal composition, and 5 to 20% by weight of the entire insecticidal composition. It consists of % by weight of molding aid, 1 to 2% by weight of potency enhancer of the entire insecticidal composition, 10 to 30% by weight of neutralizer of the entire insecticidal composition, 0.2 to 1% by weight of surfactant of the entire insecticidal composition, and the remaining amount of foaming agent. , foams and disperses in water, and the insecticidal ingredient consists of decamethrin, the dispersant consists of sodium dodecyl sulfate, and the surfactant consists of sodium lauryl sulfate.
According to the present invention, an underwater foamable dispersible insecticidal composition is provided that has a solid formulation and rapidly foams and disperses in water upon contact with water rather than an organic solvent. In particular, an insecticidal composition is provided that has a uniform diffusion level with respect to temperature changes in water. Additionally, an insecticidal composition with excellent insecticidal performance against cockroaches is provided.

Description

{water foamable insecticidal composition}

The present invention relates to an insecticidal composition, which foams and disperses or dissolves in contact with water, making it eco-friendly and easy to use at home.

Quarantine products such as pesticides come in various formulations such as emulsions, liquid moisturizers, and moisturizers, but most use the emulsion type (EC, Emulsion Concentration).

The emulsion type is used by putting the product solution in a spray bottle according to the dilution ratio and spraying it. However, it has been pointed out that spraying causes environmental pollution problems not only to the user but also to the surrounding area due to the organic solvent contained in the emulsion.

As a technology to solve these problems, "Water-dispersed emulsion-type pesticides and their manufacturing method" (Korean Patent Publication No. 10-0454236, Patent Document 1) includes dissolving pesticides in ethanol instead of organic solvents and adding emulsifiers to water. A technology has been disclosed to provide pesticides in the form of water dispersion by forcibly emulsifying them by adding a drug dissolution solution to a dissolved emulsion.

Patent Document 1 has contributed to some extent to solving the problems of emulsion-type pesticides, but there is a problem in that the degree of dispersion tends to vary depending on temperature changes, so the degree of dispersion is not constant and the insecticidal effect is not uniform.

A solid formulation that is immediately dispersed in contact with water is preferred as a formulation to improve user usability and eco-friendliness.

However, many solid formulations can result in agglomerate formation due to coagulation, flocculation, gelation or precipitation of the solid particles within the nebulizer.

As a technology for this problem, "Stable self-dispersing low foaming solid insecticidal formulation" (Korean Patent Publication No. 10-2019-0093623, Patent Document 2) contains 25 to 85% by weight of insecticidal ingredient, 0 to 10% by weight. % of anti-foaming agent and 3 to 25% by weight of foaming agent (including low-foaming surfactant) were used to ensure stable dispersibility in cold or hard water.

In Patent Document 2, the foaming agent content was set to be small and low foaming to ensure low foaming properties, under the recognition that the generation of a large amount of foam would hinder securing dispersibility.

However, in this case, there is a problem in that dilution is not carried out quickly and smoothly when in contact with water, and the preservation power is poor.

KR 10-0454236 (2004.10.14) KR 10-2019-0093623 (2019.08.09)

The present invention is intended to solve the problems arising in the prior art as described above, and aims to provide an underwater foamable dispersible insecticidal composition that has a solid formulation and rapidly foams and disperses in water upon contact with water rather than an organic solvent. will be.

In particular, the aim is to provide a pesticidal composition that has a uniform diffusion level with respect to changes in water temperature.

In addition, the aim is to provide an insecticidal composition with excellent insecticidal performance against cockroaches.

In order to solve the above-described problems, the water-foaming dispersible insecticidal composition of the present invention contains 1 to 5% by weight of insecticidal ingredient, 3 to 10% by weight of dispersant of the entire insecticidal composition, and 5 to 20% by weight of the entire insecticidal composition. It consists of % by weight of molding aid, 1 to 2% by weight of potency enhancer of the entire insecticidal composition, 10 to 30% by weight of neutralizer of the entire insecticidal composition, 0.2 to 1% by weight of surfactant of the entire insecticidal composition, and the remaining amount of foaming agent. , foams and disperses in water, and the insecticidal ingredient consists of decamethrin, the dispersant consists of sodium dodecyl sulfate, and the surfactant consists of sodium lauryl sulfate.

In the above configuration, the molding aid is characterized in that it consists of urea.

In the above configuration, the potency enhancer is comprised of PBO, the foaming agent is comprised of sodium bicarbonate, and the neutralizer is comprised of malic acid.

In the above configuration, the insecticidal composition is characterized in that the insecticidal target is cockroaches.

In the above configuration, the insecticidal composition is used by diluting it in water to a concentration of 0.03%.

According to the present invention, an underwater foamable dispersible pesticidal composition is provided that has a solid formulation and rapidly foams and disperses in water upon contact with water rather than an organic solvent.

In particular, an insecticidal composition is provided that has a uniform diffusion level with respect to temperature changes in water.

Additionally, an insecticidal composition with excellent insecticidal performance against cockroaches is provided.

Figure 1 is a photograph showing a state in which the solid tablet-type insecticidal composition of Example 1 in the present invention is foamed and dispersed in water.

Hereinafter, the underwater foam dispersible insecticidal composition of the present invention will be described in detail.

The water foamable dispersible insecticidal composition of the present invention includes an insecticidal ingredient, a dispersant, a molding aid, an effectiveness enhancer, a foaming agent, a neutralizer, and a surfactant.

The insecticidal ingredient used in the insecticidal composition of the present invention may be any known insecticidal ingredient that effectively kills or controls insects.

Examples may include pyrethroids, organophosphates, carbamates, neonicotinoids, and microbial pesticides.

Among them, it is most preferable that it consists of decamethrin.

Decamethrin has a control effect by affecting the central nervous system of cockroaches, ants, etc., and is known to have a long-term control effect.

Decamethrin is a colorless solid substance that dissolves in water or benzene at room temperature and decomposes at temperatures above 300°C.

These insecticidal ingredients are preferably contained in an amount of 1 to 5% by weight in the total insecticidal composition, and 2.5% by weight is most preferable.

If pesticide ingredients are used in excessive amounts, it can cause various problems such as resistance in target pests, so it is most desirable to limit the amount to the minimum.

The dispersant used in the insecticidal composition of the present invention helps disperse the insecticidal ingredient in contact with water, thereby improving solubility and overall effectiveness.

Types of dispersants may include polymer dispersants, surfactants, and polymer surfactants.

Among these, sodium dodecyl sulfate (SDS) is an anionic surfactant that has a hydrophobic tail and hydrophilic head structure, so it can interact with both water and oily substances.

In particular, when added to water, it reduces surface tension and improves wettability, allowing insecticidal ingredients to be uniformly dispersed in water.

This dispersant is preferably contained in an amount of 3 to 20% by weight in the total insecticidal composition, and more preferably 3 to 10% by weight, and most preferably 7% by weight.

If sodium dodecyl sulfate is used in excessive amounts, excessive foaming and subsequent fluidity deterioration occur, and the contact between the insecticidal ingredient and the target is reduced, resulting in a decrease in insecticidal efficacy, and the phenomenon of blocking the spray nozzle pipe may occur. there is.

Additionally, there is a problem of causing excessive toxicity to aquatic organisms.

The molding aid used in the insecticidal composition of the present invention serves to stabilize the physical form of the insecticide to facilitate easy handling, storage, and application.

Among them, urea helps improve the fluidity and compressibility of pesticide particles, allowing them to be more easily and consistently formed into desired shapes such as pills or pellets.

In addition, urea also acts as a plasticizer. . Plasticizers are substances added to materials to improve flexibility, softness, and processability. They act as plasticizers by reducing the intermolecular forces between pesticide particles, making them more easily deformable and fluid.

In addition, urea also has an effect on improving dispersibility in water.

As mentioned above, it reduces the intermolecular force between insecticidal ingredient particles, and in water, it can increase the surface area of insecticidal ingredient particles in contact with water, which can improve the ability of insecticidal ingredients to dissolve and disperse in water. .

These molding aids are preferably contained in an amount of 5 to 32% by weight in the total insecticidal composition, with 5 to 20% by weight being more preferred, and 18% by weight being most preferred.

If the above-mentioned urea is used in excessive amounts, the brittleness of the granules increases and the strength decreases, which reduces handling and storage characteristics. In particular, it affects the solubility of the composition in water, making dispersion difficult.

The potency enhancer used in the insecticidal composition of the present invention serves to improve the insecticidal and control effects by improving the effect of the insecticidal ingredient.

Piperonyl butoxide (PBO) is a suitable potency enhancer for this purpose.

PBO inhibits the enzyme activity of insects that can decompose insecticidal ingredients, making the insecticidal ingredients more powerful and lasting longer.

Specifically, PBO inhibits the activity of cytochrome P540 enzyme in insects.

This enzyme plays a role in metabolizing and detoxifying insecticidal ingredients in the insect's body. By inhibiting this enzyme, insects are prevented from decomposing insecticidal ingredients, allowing the insecticide to remain active for a longer period of time.

This effectiveness enhancer is preferably contained in an amount of 1 to 2% by weight in the total insecticidal composition, and 1.5% by weight is most preferable.

Excessive use of PBO is not appropriate as it can remain in the environment for a long time, causing bioaccumulation in organisms and potentially causing long-term damage.

The foaming agent used in the insecticidal composition of the present invention is preferably sodium bicarbonate.

When sodium bicarbonate is added to water, it reacts with the acid present in the pesticide formulation and releases carbon dioxide gas, creating a foaming effect.

This foam effect increases the contact time between the insecticidal ingredient and the pest, and prevents leakage of the insecticidal ingredient by coating the surface of the material onto which the insecticide is sprayed or applied, allowing it to remain in contact with the target pest for a longer period of time.

In addition to its foaming properties, sodium bicarbonate also acts as a buffering agent to stabilize the pH of the formulation.

The foaming agent used in the composition helps improve its effectiveness by increasing the contact time between the insecticide and the insect. Suitable foaming agents may include, but are not limited to, natural or synthetic surfactants, proteins, and gums.

This foaming agent is preferably contained in a residual amount of the entire insecticidal composition, generally 10 to 79.8% by weight, with 30 to 60% by weight being appropriate, and 50.5% by weight being most preferable.

The neutralizing agent used in the composition is to maintain the pH balance of the pesticide formulation and prevent excessive alkalinization. If the alkalinity of the pesticide is increased by other ingredients, it may reach a level that is not optimal for application or efficacy. Therefore, a neutralizing agent is added to prevent excessive alkalinization. To prevent.

The neutralizing agent for this purpose is preferably an organic acid, and malic acid is particularly suitable.

In addition to its neutralizing properties, malic acid can also act as a chelating agent.

In other words, it may help bind to metal ions in formulations and improve the solubility of certain ingredients.

This neutralizing agent is preferably contained in an amount of 10 to 30% by weight in the total insecticidal composition, and 20% by weight is most preferable.

If malic acid is used in excessive amounts, the pH level becomes acidic, causing decomposition or degradation of the insecticidal ingredients, thereby reducing the insecticidal effect.

Surfactants used in the composition help improve the overall coverage and absorption of pesticides, allowing for more effective pesticide control. Suitable surfactants may include, but are not limited to, anionic, cationic, or nonionic surfactants.

Surfactants are substances that have both hydrophilic and hydrophobic properties and reduce the surface tension between liquid and solid, making it easier to disperse solid particles in liquid.

Sodium lauryl sulfate is preferred as a surfactant for this purpose. In addition to the above actions, sodium lauryl sulfate reduces the surface tension of water, allowing the formulation to spread more easily on the sprayed surface, improving the coverage of pesticides and increasing efficacy. There will be.

It can also act as a wetting agent, allowing water to more easily penetrate porous surfaces by reducing surface tension.

These surfactants are preferably contained in an amount of 0.2 to 1% by weight in the total insecticidal composition, and 0.5% by weight is most preferred.

If sodium lauryl sulfate is used in excessive amounts, it is toxic to aquatic life, increases manufacturing costs, and increases foam generation, resulting in excessive foaming and lowering insecticidal efficacy.

Hereinafter, examples and comparative examples of the present invention will be described in detail.

The pesticidal compositions of Examples and Comparative Examples in the form of solid pills were prepared using the formulations in Table 1 below.

division A B C D E F G total Example 1 2.5 7 18 1.5 50.5 20 0.5 100 Example 2 One 3 5 One 79.8 10 0.2 100 Example 3 5 20 32 2 10 30 One 100 Comparative Example 1 0.5 7 18 1.5 52.5 20 0.5 100 Comparative example 2 2.5 2 18 1.5 55.5 20 0.5 100 Comparative Example 3 2.5 21 18 1.5 36.5 20 0.5 100 Comparative Example 4 2.5 7 4 1.5 64.5 20 0.5 100 Comparative Example 5 2.5 7 33 1.5 35.5 20 0.5 100 Comparative Example 6 2.5 7 18 0.5 51.5 20 0.5 100 Comparative Example 7 2.5 7 18 1.5 61.5 9 0.5 100 Comparative example 8 2.5 7 18 1.5 39.5 31 0.5 100 Comparative Example 9 2.5 7 18 1.5 50.9 20 0.1 100 Comparative Example 10 2.5 7 18 1.5 49.9 20 1.1 100

(A: Decamethrin, B: Sodium dodecyl sulfate, C: Urea, D: PBO, E: Sodium bicarbonate, F: Malic acid, G: Sodium lauryl sulfate, Unit:% by weight)

Hereinafter, an experimental example of the present invention will be described in detail.

<Experimental Example 1> Experiment measuring drug efficacy according to concentration

The tablet-type insecticidal composition of Example 1 was added at different concentrations to a sprayer filled with water at 20°C, waited for 1 minute, then sprayed in the same amount in a sealed cage, then cockroaches were introduced, and 24 hours passed. The average mortality rate was confirmed by measuring the number of dead animals afterward and is shown in Table 2.

Drug concentration (%) Total test population Number of fatalities after 24 hours Average fatality rate (%) - 75 0 0 0.03 75 75 100 0.02 75 64 85.3 0.0156 75 50 66.7

Looking at Table 2 above, it can be seen that the fatality rate was highest at a drug concentration of 0.03%.

<Experimental Example 2> Drug efficacy measurement experiment 1 according to examples and comparative examples

Based on Experimental Example 1, the drug concentrations of the examples and comparative examples were all adjusted to a drug concentration of 0.03% at a dilution factor of 80, and then a drug efficacy measurement experiment was performed in the same manner as Experimental Example 1, and the results are shown in Table 3 below. shown in

However, water at 20°C was applied, and sprayed after waiting for 1 minute.

Figure 1 is a photograph showing the experimental state of Example 1.

division Total test population Number of fatalities after 24 hours Average fatality rate (%) Example 1 75 75 100 Example 2 75 75 100 Example 3 75 75 100 Comparative Example 1 75 32 42.67 Comparative example 2 75 32 42.67 Comparative Example 3 75 24 32 Comparative Example 4 75 47 62.67 Comparative Example 5 75 49 65.33 Comparative Example 6 75 52 69.33 Comparative Example 7 75 48 64 Comparative example 8 75 51 68 Comparative Example 9 75 52 69.33 Comparative Example 10 75 53 70.67

As a result of the above experiments, the mortality rate in all examples reached 100%, but the comparative examples only had a mortality rate of about 42 to 70%.

This is believed to be due to reasons such as poor dispersion or poor control of the amount of foam during foaming.

<Experimental Example 3> Experiment 2 for measuring drug efficacy by Examples and Comparative Examples

The same procedure as in Experimental Example 2 was carried out, but the water temperature was set to 7°C.

The experimental results are shown in Table 4 below.

division Total test population Number of fatalities after 24 hours Average fatality rate (%) Example 1 75 75 100 Example 2 75 75 100 Example 3 75 75 100 Comparative Example 1 75 25 33.33 Comparative example 2 75 30 40 Comparative example 3 75 21 28 Comparative Example 4 75 41 54.67 Comparative Example 5 75 44 58.67 Comparative Example 6 75 46 61.33 Comparative example 7 75 45 60 Comparative example 8 75 45 60 Comparative Example 9 75 46 61.33 Comparative Example 10 75 47 62.67

As a result of the above experiment, the efficacy of the comparative examples was lower than when administered at a temperature of 20°C, while the examples showed no change.

<Experimental Example 4> Drug efficacy measurement experiment 3 according to examples and comparative examples

The same procedure as in Experimental Example 2 was carried out, but the water temperature was set to 4°C.

The experimental results are shown in Table 5 below.

division Total test population Number of fatalities after 24 hours Average fatality rate (%) Example 1 75 75 100 Example 2 75 68 90.67 Example 3 75 66 88 Comparative Example 1 75 11 14.67 Comparative example 2 75 24 32 Comparative example 3 75 16 21.33 Comparative example 4 75 28 37.33 Comparative Example 5 75 27 36 Comparative Example 6 75 23 30.67 Comparative Example 7 75 22 29.33 Comparative example 8 75 23 30.67 Comparative Example 9 75 21 28 Comparative Example 10 75 17 22.67

As a result of the above experiment, the efficacy of the comparative examples was lower than when administered at a temperature of 7°C, while the examples showed almost no change.

Claims (5)

In the pesticidal composition,
1 to 5% by weight of insecticidal ingredients of the entire insecticidal composition, 3 to 10% by weight of dispersant of the entire insecticidal composition, 5 to 20% by weight of molding aids of the entire insecticidal composition, and 1 to 2% by weight of the potency enhancer of the entire insecticidal composition. , It consists of a neutralizing agent of 10 to 30% by weight of the total insecticidal composition, a surfactant of 0.2 to 1% by weight of the total insecticidal composition, and the remaining amount of a foaming agent, and is foamed and dispersed in water,
The insecticidal ingredient consists of decamethrin, the dispersant consists of sodium dodecyl sulfate, and the surfactant consists of sodium lauryl sulfate,
Underwater foam dispersible insecticidal composition.
According to clause 1,
The molding aid is characterized in that it consists of urea,
Underwater foam dispersible insecticidal composition.
According to clause 2,
The potency enhancer consists of PBO,
The foaming agent consists of sodium bicarbonate,
The neutralizing agent is characterized in that it consists of malic acid,
Underwater foam dispersible insecticidal composition.
According to clause 3,
The insecticidal composition is characterized in that the insecticidal target is cockroaches,
Underwater foam dispersible insecticidal composition.
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